化学工程2026，Vol.54Issue(1)：20-25,39,7.DOI:10.3969/j.issn.1005-9954.2026.01.004
硫酸盐浴中电沉积Zn-Co合金涂层用于Q235钢的腐蚀防护
Electrodeposition of Zn-Co alloy coatings in sulfate bath for corrosion protection of Q235 steel
摘要
Abstract
Q235 steel is susceptible to serious corrosion failure when it is subjected to highly corrosive environments such as high salt,humidity and industrial atmospheres in long-term service.To address this phenomenon,Zn and Zn-Co alloy coatings were prepared by electrodeposition on the surface of Q235 steel in sulfate baths,and the corrosion resistance of the coatings was studied in detail.The electrochemical test results show that Zn coating prepared at a current density of 2 A/dm2 has a more positive corrosion potential and a lower corrosion current density,demonstrating good corrosion resistance.Under the same current density,when the molar ratio of Zn2+to Co2+in the plating solution is controlled at 9∶1,the prepared Zn-Co alloy coating exhibits a lower corrosion current density(1.122 μA/cm2)compared to Zn coating,along with a higher coating resistance(2389 Ω·cm2)and charge transfer resistance(1 705 Ω·cm2).Furthermore,the charge transfer resistance of Zn-Co alloy coating is 2.097 times that of Q235 steel.Chemical composition analysis reveals that the Zn-Co alloy coating contains mass fraction 0.7%of cobalt.The trace amount of cobalt significantly enhances the corrosion resistance of Zn-Co alloy coating,providing good protection for Q235 steel.关键词
Zn-Co涂层/硫酸盐浴/电沉积/耐腐蚀/Q235钢Key words
Zn-Co coating/sulfate bath/electrodeposition/corrosion resistance/Q235 steel分类
矿业与冶金引用本文复制引用
吴玉博,张冠华,吴志根,陆威..硫酸盐浴中电沉积Zn-Co合金涂层用于Q235钢的腐蚀防护[J].化学工程,2026,54(1):20-25,39,7.基金项目
国家自然科学基金资助项目(52370149,51976126) （52370149,51976126）
国家重点研发计划(2023YFC3707701) （2023YFC3707701）
上海市自然科学基金资助项目(22ZR1442700) （22ZR1442700）
